
/**
 *
 * @author boerje
 * 
 * special events:
 * # == boss approaching
 * ! == level starting
 * - == level end
 * * == wave starting
 */


/*
 * ids:
 * a = 8 small slave shuttle class ufo, linear down
 * b = 5 small slave shuttle class ufo, slow narrow sine
 * c = 10 small ufos, high amplitude sine
 * d = 8 bigger king class ufos, diagonal right (coming from right side!)
 * e = 8 bigger king class ufos, diagonal left (coming from right side!)
 * f = 1 spider class assassin type ufo, coming from behind
 * g = something
 * h = 3 overloard type ufos, vibrating down
 * i = 6 small slaves from behind in sinus
 * x = boss 1
 */
